| Value | Category |
|---|---|
| 1 | Inside the dwelling-from the public network |
| 2 | Inside the dwelling-from own system |
| 3 | Outside the dwelling-inside the building-from the public network |
| 4 | Outside the dwelling-inside the building-from own system |
| 5 | Outside the dwelling-outside the building-from the public network |
| 6 | Outside the dwelling-outside the building-from own system |
| 7 | Without water supply installation |